I've had the same issue, starting yesterday, maybe the day before. I've submitted a bug report to Chromium (which is as yet unacknowledged), and it's not just you, so hopefully they're aware of it and are working on a fix.

Until then, you'll just have to hope everything gets sorted by the time you want to publish.

You can try going to chrome://flags/ , finding "Wheel Scroll Latching", and setting it to Enabled. Mine was set to Disabled before, and I feel like it's helped a little bit, though that might be my imagination. Worth a try, though, just make sure to set it back if it doesn't help.

Noting that the Chromium bug has been looked at by a few people, and a working solution at the minute is going to chrome://flags, finding "#site-isolation-trial-opt-out" and setting it to Opt-out.

This might have security ramifications - the description on the flags page says "Caution: this disables important mitigations for the Spectre CPU vulnerability affecting most computers." - so change this flag at your own risk.